Supporting plate for chill molds



April 4, 1939. HAAG 2,153,464

SUPPORTING PLATE FOR CHILL MOLDS Filed June 2, 1937 FIG. 3

J/mnneo' ffaay Afformya I Patented Apr. 4, 1939 i I 'UNITED STATESPATENT OFFICE I SUPPORTING PLATE FOR CHILL MOLDS Johannes Haag,Neunkirchen, District Saar, Germany Application June 2, 1937, Serial No.146,048 In Germany December 10, 1936 6 Claims. (Cl. 22139) The object ofthis invention is .to provide a is provided with an aperture, directlyinto the supportin plate for chill molds, comprising a casting pit, butin any case will lead to very separate wear-resisting plate expo ed :tothe acserious disadvantages, the. removal of which will tion of the jetof molten metal poured into the involve a gr a deal of W d heavy p mold.It has appeared hardly possible to prevent the 5 As is known, theconsumption of the supportmolten metal from breaking through in thisway, ing plates in casting ingots in chill molds has 9. since the degrof couring in the wear Plate considerable influence upon the economy ofmetal can hardly be ascertained at all, or at least only manufacture,more particularly in the producwith great difliculty. If it is desiredto obviate tion of steel. Many suggestions have therefore such failuresthoroughly by renewing the wear 10 already been made with a view todiminishing the plates at the right time, this merely means thatconsumption of supporting plates. the wear plates must be replaced byfresh ones A very useful known supporting plate contoo soon, andconsequently at least a portion of sists of individual parts, one ofwhich serves as the advantage of such composite supporting awear-resisting plate, which is exposed to the p ate is Wasted- 16 directaction of the jet of molten metal, and is Now the object of the presentinvention 18 t0 therefore subjected to the maximum wear. provide asimple means for fundamentally pre- When the wear has reached a definitestage, only venting the metal from breaking through, withthis portion ofthe supporting plate, which may out involving an unduly heavy pt o of 20be referred to as a wear plate, is then exchanged, supporting plates.This aim is attained by pro- 20 while the other parts of the supportingplate may viding, between the wear plate and the base remain in use foralmost an unlimited time. plate, an intermediate space filled withfire-proof Now it has been found that even this composite material.

supporting plate also exhibits disadvantages, Further advantages andfurther features of which are illustrated in the accompanyingdiatheinvention will be gathered from the ensuing 25 grammatic drawing, inwhich description, in which one example of theinven- Flgure 1 is a topplan view of a wear resisting tion will be described with reference toFigures plate of my invention. 3 and 4 of the accompanying drawing, inwhich Figure 1A is an elevation in section of the plate Figure 3 is aplan of a supporting plate acof ure 1. cording to the invention, withthechill mold in 30 Figure 2 is a top plan view of the plate ofFigsection on the left-hand side and with the chill ure '1 after it hasbecome worn through use. mold removed on the right-hand side, and

Figure 2A is an elevation in section of the plate Figure 4 shows thesame in sectional elevation. 0f Figure 2. A composite supporting platecomprises an Figure 3 is a top plan view partly in section actual baseplate 5. This is provided, at the 35 illustrating a mold and a wearresisting plate places where a chill mold 6 is to be mounteduppositioned on a support frame. I v on it, with a raised portion 1,having a circular Figure 4 is a side elevation in section of the recess8 in the centre. Upon the projecting rim apparatus of Figure 3. 1 fitsan actual wear-resisting plate 9, which has 0 The plate I has on itsunder side a projection a projection II on its under side, which islike- 40 th main P p Of hi h s to increase the wise of circular form andfits into the recess 8 cross-sectional of the Plate r th P in the baseplate 5. The external surface I! of pose of ensuring It a 9 In Figure 1the projection I on the base plate 5 is conical is diagrammaticallyindlcated hollow 3 in the in shape, and is continuous withthe external tifinifg foltit sifitifittfitoii tft of 9 which is likewise this hollowwill become progressively larger and comcal' The base plate 5 and thefz' 2?: larger, and will finally reach the form shown at 9 are i g i bya a fragile w v l in figure The last casting obtained with is providedwith internally, conical side walls I5,

this wear plate will indeed still be successful, the mchnatmn of whichcorresponds to the 50 but if it is used again the next jet 'of molten ofthe surfaces and Upon the meta] will break through th weakest point, 5of surface the frame It is provided with cam-like the plate, so that themolten metal will now esp j i |6..Wh10h enable h 0.11111 mold 5 t0 capeunderneath the wear plate. It will then be accurately centered whenlowered from above pass either on to the base plate, or, if the latter,by a crane on to the wear plate 9. For this 55 purpose the internalsurfaces ll of the cams it are bevelled.

The supporting plate, consisting in all of three parts, namely the baseplate, the wear plate and the frame, may also be held together by awedge or key connection. For this purpose there is provided laterally inthe frame II a recess it, which registers with a similar recess locatedbeneath it in the base plate 5. In this recess is inserted a bolt or pini9, which has a lateral aperture, through which a key or wedgejl can beBetween the downward projection ii of the wearplateandtheoppositesuri'aceof thebase plate 5 there is provided according to theinvention in the cavity I a free space, which is filled with fire-proofmaterial. When, with such a supporting plate, the wear plate is scouredaway as m as is indicated in Figure 2, the next castin does not causethe metal to break throug since the fire-proof material which is a poorconductor of heat, opposes the passage of the molten metal in the chillmold until it has solidified. After removal of the chill mold filledwith the ingot, the workmen can now see, as soon as the fireproofmaterial is uncovered, that the wear plate requires to be renewed. A

The emp oyment of this invention in practice has shown a substantialimprovement in the consumption of supporting plates as compared witheven the best of the supporting plates hitherto adop What I claim is:

1. Apparatus for use in casting ingots comprising an ingot mold open at.its lower end and a stool upon which said mold is supported, said stoolcomprising a base plate having a raised formation defining a recess atits'upper surface, a wear resisting plate having an integral projectionon its bottom surface cooperating with said base plate surface recess toremovably seat said wear resisting plate upon said base plate and meansfor securing said wear resisting plate upon said base plate, saidsecuring means cooperating with said wear resisting plate to supportsaid ingot mold.

' 2. Apparatus for use in casting ingots comprising an ingot mold openat its lower end and a stool upon which said mold is seated, said stoolcomprising a base plate having a recess formation at its upper surface,a wear resisting plate having a downwardly projecting portion extendingpartly within said recess, means for fastening said wear resisting plateto said base plate and and a layer of re-enforcing material which is apoor conductor of heat between the projection and the bottom of saidrecess.

3. Apparatus of the type defined in claim 2 for use in casting ingotswherein said re-enforcing layer is of refractory material.

4'. An apparatus for use in casting ingots com prising an ingot moldopen at its lower end and a stool on which said mold is seated, saidstool comprising a base plate, an annular projection at the uppersurface of said plate having a. vertically extending inner wall and atapering outer wall, a removable wear resisting plate resting on theupper surface of said annular projection and provided with a downwardlyextending projection in theform of a disc, the portion of said wearresisting plate resting on said annular projection having an outer wallinclined at the same angle as said tapering outer wall of said annularprojection, and a ring having a tapering wall fitting said taperingwalls of said annular projection and said wear resisting plate.

5. An apparatus for use in casting ingots comprising an ingot mold openat its lower end and a stool on which said mold is seated. said stoolcomprising a base plate, an annular projection at the upper surface ofsaid plate having a vertically extending inner wall and an upwardlytapering outer wall, a removable wear resisting plate resting on theupper surface of said annular projection, said wear resisting platebeing provided with a downwardly extending projection in the form of adisc, the thickness of which is less than the height of said annularprojection to form a space between the bottom surrounded by said annularprojection and the lower surface of said downwardly extending projectionof said wear resisting plate, and refractory material filled in saidspace, the portion of said wear resisting plate resting on said annularprojection having an upwardly tapering outer wall corresponding to theupwardly tapering outer wall of said annular projection, and a ring,having a downwardly tapering wall fitting said upwardly tapering wallsof said annular projection and said wear resisting plate.

6. An apparatus for use in casting ingots comprising an ingot mold openat its lower end and a stool on which said mold is seated, said stoolcomprising a base plate, an annular projection at the upper surface ofsaid plate having a vertically extending inner wall and an upwardlytapering outer wall, a removable wear resisting plate resting on uppersurface of said annular projection, said wear resistingplate-beingprovided with a downwardly extending projection in the formof a disc, the thickness of which is less than the height of saidannular projection, to form a space between the bottom surrounded bysaid annular projection and the lower surface of said downwardlyextending projection of said wear resisting plate, refractory materialin said space, the portion of said wear resisting plate resting on saidannular projection having an upwardly tapering outer wall correspondingto the upwardly tapering outer wall of said annular projection, a ringhaving a downwardly tapering wall fitting said upwardly tapering wallsof said annular projection and said wear resisting plate, and cam-likeprojections on said ring adapted to cooperate with the upwardly taperingouter surface of said mold to guide the latter into its correct positionwhen said mold is beinglowered on to the supporting stool.

JOHANNES HAAG.

